Search found 902 matches

by sirbod
Mon Dec 03, 2018 7:36 am
Forum: software
Topic: Fervour bugs
Replies: 1
Views: 213

Re: Fervour bugs

I figured it out in the end, it was an issue in the protection which relied on a pipelined instruction executing prior to it being overwritten. The instruction in question set the logical address of the code and affected all relative addressing in the game thereafter. After unpipelining the instruct...
by sirbod
Sat Dec 01, 2018 10:55 am
Forum: software
Topic: Fervour bugs
Replies: 1
Views: 213

Fervour bugs

Do anyone have a version of Fervour newer than 1.01? I've been looking at why it randomly crashes on some machines and found a fairly fatal bug in its code that translates relative screen addresses to logical screen addresses during initialisation. There's 5 relative addresses that need adjusting, s...
by sirbod
Mon Nov 26, 2018 9:25 pm
Forum: software
Topic: ADFFS 2.70 released
Replies: 0
Views: 129

ADFFS 2.70 released

ADFFS 2.70 is now available for download from JASPP or via PackMan . Changes include: Now works on RISC OS 5.27 nightly builds CD ISO imaging added Improvements to JFD floppy imaging USBJoystick now bundled with ADFFS Bug fixes ADFFS and all games that work on the Pi are now available via PackMan by...
by sirbod
Mon Nov 26, 2018 11:34 am
Forum: software
Topic: Could someone explain how to use ADFimager?
Replies: 1
Views: 95

Re: Could someone explain how to use ADFimager?

Unzip, move to A3000, write with ADFimager (not sure how to do this bit as I've never used it). ADF's that are a full floppy will need to be unzipped via SparkFS or SparkPlug on the A3000. I have a floppy image which is 819.2k (unzipped) in size. It a game? Some game ADF's are cut short to fool the ...
by sirbod
Sun Nov 25, 2018 7:54 pm
Forum: hardware
Topic: VL2304PS-QC - ANNA
Replies: 22
Views: 587

Re: VL2304PS-QC - ANNA

I would have thought an 16L8A could be reverse engineered by applying a binary sequence to pins 1..9 and see what outputs on 11..19, its only AND/OR gates. It would be interesting to know under what condition it kicks in, we know it affects MUL/MLA but the affect on other instructions isn't so obvio...
by sirbod
Sat Nov 24, 2018 9:43 am
Forum: software
Topic: Uninstalling Module ?? (GuardDD)
Replies: 3
Views: 156

Re: Uninstalling Module ?? (GuardDD)

jvernet wrote:
Fri Nov 23, 2018 8:12 pm
ToolBox 1.23. Is there a way to update this toolbox ?
I think the latest version is in the "System resources" update on ROOL, you'll need to update all the Toolbox Modules.
by sirbod
Sat Nov 24, 2018 9:37 am
Forum: software
Topic: Bought Crystal Maze from ebay but Disc 1 faulty
Replies: 3
Views: 225

Re: Bought Crystal Maze from ebay but Disc 1 faulty

In the Commodore 64 land from where I come, it is possible to rewrite floppies from images (if you have the right hardware. Is this kind of thing possible in Acorn land? The majority of disc protection used on Arc games is copyable in software with a 1772 FDC, very few games used methods created us...
by sirbod
Sun Nov 18, 2018 9:19 am
Forum: hardware
Topic: A3000 in-system programmable ROM -- any interest?
Replies: 32
Views: 784

Re: A3000 in-system programmable ROM -- any interest?

myelin wrote:
Sat Nov 17, 2018 9:45 pm
Also wow! Didn’t expect this much interest!
This was one of the pre-reqs for RISC OS 3.20. Although that's some way off due to other issues, this would allow RISC OS 3.11 / 3.19 to be patched and tested on physical.
by sirbod
Sun Nov 18, 2018 9:15 am
Forum: hardware
Topic: IDE->SD/CF Adapters (What works and what doesnt)
Replies: 15
Views: 475

Re: IDE->SD/CF Adapters (What works and what doesnt)

RichardP wrote:
Sun Nov 18, 2018 8:52 am
Much appreciated - All working again. Does the patch need to be applied on every boot, or just run once ?
It needs to be loaded on every boot as it replaces ADFS.
by sirbod
Sat Nov 17, 2018 2:07 pm
Forum: hardware
Topic: IDE->SD/CF Adapters (What works and what doesnt)
Replies: 15
Views: 475

Re: IDE->SD/CF Adapters (What works and what doesnt)

RichardP wrote:
Sat Nov 17, 2018 1:42 pm
Its being copied from a DOS disk .. should the permissions be set to something?
If you've extracted it on a PC, you'll need to set the filetype to "Module" before running it - Middle mouse click on the file and select "File 'ADFS'\Set type"
by sirbod
Sat Nov 17, 2018 1:13 pm
Forum: hardware
Topic: IDE->SD/CF Adapters (What works and what doesnt)
Replies: 15
Views: 475

Re: IDE->SD/CF Adapters (What works and what doesnt)

RichardP wrote:
Sat Nov 17, 2018 12:37 pm
I have the patch but no idea what to do with it.
If you're talking about the pre-patched ADFS 2.68 - just run it.
by sirbod
Mon Nov 12, 2018 8:08 am
Forum: hardware
Topic: Any kind soul have drivers for an ACE Riscblaster?
Replies: 4
Views: 253

Re: Any kind soul have drivers for an ACE Riscblaster?

It's a SoundBlaster, so Adlib, sample playback and an extension port for external MIDI devices. Load up Maestro and play something via MIDI. I'm not sure if the Joystick port is supported as there's no Joystick Module, but it may support MIDI. If you want to program it, grab a SoundBlaster manual. Y...
by sirbod
Sun Nov 11, 2018 2:11 pm
Forum: software
Topic: Black Angel
Replies: 32
Views: 2556

Re: Black Angel

Thought I'd give this game another try as I still need to record a video of it. I've still not figured out how to jump between systems, but am pretty sure it can be done as you can buy gate passes from planets and space stations. The other issue I'm finding is how to navigate around a system, for ex...
by sirbod
Fri Nov 09, 2018 5:51 am
Forum: hardware
Topic: IDE->SD/CF Adapters (What works and what doesnt)
Replies: 15
Views: 475

Re: IDE->SD/CF Adapters (What works and what doesnt)

what distracted me was the reference to disk error numbers at the beginning I should probabably start a new thread at some point, with the concise detail from that thread and get an admin to pin it. HD issues repeatedly come up and certainly as far as ADFS goes, I think we've resolved all the previ...
by sirbod
Thu Nov 08, 2018 1:11 pm
Forum: hardware
Topic: IDE->SD/CF Adapters (What works and what doesnt)
Replies: 15
Views: 475

Re: IDE->SD/CF Adapters (What works and what doesnt)

There are several issues that cause IDE devices to fail, all of which can be resolved if you take a look at this thread. ADFS was based around the first IDE standard, which stipulated a DRQ timeout of 500ns, this was removed in later revisions. The patched ADFS 2.68 will resolve this issue Bulk data...
by sirbod
Tue Nov 06, 2018 9:29 pm
Forum: hardware
Topic: Formatting real harddiscs >512MB on RO3.1
Replies: 20
Views: 1466

Re: Formatting real harddiscs >512MB on RO3.1

It sounds like the HCCS driver suffers the same issue ADFS did, namely it didn't keep up with the IDE standards. All the issues with ADFS and SD/CF/NIC's/SATA were resolved via a combination of software and/or hardware fixes in this thread, it's quite possible similar software patches need to be app...
by sirbod
Mon Nov 05, 2018 8:11 am
Forum: hardware
Topic: Any kind soul have drivers for an ACE Riscblaster?
Replies: 4
Views: 253

Re: Any kind soul have drivers for an ACE Riscblaster?

I was going to bid on that so I could use it for my MT32 emulator/orchestrator. Completely forgot to bid on it in the end :roll: I've seen several threads about this card over the years, but have yet to see one about it actually working or being used! It was my understanding that the Podule has two ...
by sirbod
Wed Oct 31, 2018 6:17 am
Forum: software
Topic: RISC OS relicensed: now under Apache 2.0!
Replies: 81
Views: 2362

Re: RISC OS relicensed: now under Apache 2.0!

The only necessity for the DDE is if you want to rebuild the whole ROM. If you really want to develop one of the OS modules, most of them are compilable for softloading, and this is (at least theoretically) possible with GCC. Do ROOL accept GCC code? I was under the impression OS ROM code must use ...
by sirbod
Sun Oct 28, 2018 4:56 pm
Forum: software
Topic: Transferring floppies to HD / IDE device
Replies: 11
Views: 359

Re: Transferring floppies to HD / IDE device

Crystal Rainforest does - iirc you couldn't get it to behave with JFD? I've not look at it in detail yet, its possibly its talking directly to the chipset, needs slow sectors or just doing something daft. My final statement on it was: there's more work to be done on figuring out why the protection ...
by sirbod
Sun Oct 28, 2018 1:45 pm
Forum: software
Topic: Transferring floppies to HD / IDE device
Replies: 11
Views: 359

Re: Transferring floppies to HD / IDE device

HFE is a reasonably compact format at this stage (2mb/dd-disk) It must be an FM/MFM image. Flux would be in the tens of MB. it doesn't cope with weak bits (although does JFD encode weak bits?) - I know there are moves to get a format into flashfloppy that does cope with weak bits, and that should b...
by sirbod
Sun Oct 28, 2018 12:55 pm
Forum: software
Topic: Transferring floppies to HD / IDE device
Replies: 11
Views: 359

Re: Transferring floppies to HD / IDE device

I know I've mentioned it on the JASPP forum, but there does seem to be an argument for making the kryoflux dump (or equivalent) available for released titles, that way if people are using older hardware which would run the disks directly, they can just convert them to a format that will work with a...
by sirbod
Sun Oct 28, 2018 12:16 pm
Forum: software
Topic: the best in size draw line algorithm for ARM
Replies: 14
Views: 411

Re: the best in size draw line algorithm for ARM

You could use some binary tricks to optimize calculating sx and sy as they're small values: x0=0 y0=1 dx=2 dy=3 c=4 sx=5 sy=6 err=7 e2=8 4: STMFD R13!, {R0-R8, R14} 8: ADD x1, dx, x0 int x1 = dx + x0; 12: ADD y1, dy, y0 int y1 = dy + y0; 16: ORRS sx, dx, #1 << 30 int sx = dx > 0 ? 1 : -1; 20: RSBMI ...
by sirbod
Sun Oct 28, 2018 11:50 am
Forum: software
Topic: the best in size draw line algorithm for ARM
Replies: 14
Views: 411

Re: the best in size draw line algorithm for ARM

if you remove "add r8,r7,r7" and reverse the two compares, using shifted r7. E.g. for the first use: "cmp r4,r7,lsl#1" then reverse the conditions for the next instructions... "addlt r7,r7,r4" etc. And similar for the second compare. That should get you to 84 bytes. :) You can't do that as it would...
by sirbod
Sun Oct 28, 2018 10:24 am
Forum: software
Topic: Transferring floppies to HD / IDE device
Replies: 11
Views: 359

Re: Transferring floppies to HD / IDE device

!ADFFS needs 4MB of RAM doesn't it? I've only 2MB unfortunately. It's the floppy image that needs the RAM, so floppy image size will be the main factor. You might at a pinch be able to mount images and run them on 2MB, you'd have to try it and see how much memory is left, its going to be tight. How...
by sirbod
Sun Oct 28, 2018 9:30 am
Forum: hardware
Topic: What version?
Replies: 7
Views: 389

Re: What version?

You've not specified your retro use, so I'll detail from a gaming perspective. A305 - not enough memory unless it's been upgraded A310 / A410(/1) - enough memory for most games, no onboard IDE or NIC but can be added via Podule A440(/1) - will run all pre RiscPC games, no onboard IDE or NIC but can ...
by sirbod
Tue Oct 23, 2018 8:12 am
Forum: software
Topic: RISC OS relicensed: now under Apache 2.0!
Replies: 81
Views: 2362

Re: RISC OS relicensed: now under Apache 2.0!

it would be amazing to get the source code to Arthur or RISC OS 2/3 I don't believe source exists for the early OS versions. The elephant in the room here is the DDE - if that's not opened up they're still requiring people to pay to contribute :( I just said the exact same thing over on ROOL. The O...
by sirbod
Thu Oct 11, 2018 7:24 am
Forum: software
Topic: Difficulties extracting zip / adf files to DOM
Replies: 18
Views: 319

Re: Difficulties extracting zip / adf files to DOM

Nutter wrote:
Wed Oct 10, 2018 8:49 pm
Please help! :cry:
If you have 4MB RAM, use ADFFS to mount the floppy images.

Download officially released games from JASPP as well, of which Nebulus is one JASPP own the rights too.
by sirbod
Wed Sep 19, 2018 10:05 am
Forum: software
Topic: Birds of War - RISC PC
Replies: 6
Views: 427

Re: Birds of War - RISC PC

Does anyone know if Birds of War works in any way on a RISC PC (assuming I have the original release for my A3010 - same discs too!)? There was a RISC PC version, but given it was released in 1994 it won't be StrongARM compatible (I have an original, but haven't imaged or tested it yet). You should...
by sirbod
Fri Sep 14, 2018 12:56 pm
Forum: hardware
Topic: Voltmace Mouse Eliminator
Replies: 2
Views: 209

Re: Voltmace Mouse Eliminator

Thanks, that's just the information I needed.

I can probably get by without one, thanks for the offer though. Once I have Drop Ship and Man at Arms playing correctly with a USB Joystick, that will probably be sufficient enough.
by sirbod
Fri Sep 14, 2018 6:29 am
Forum: hardware
Topic: Voltmace Mouse Eliminator
Replies: 2
Views: 209

Voltmace Mouse Eliminator

Does anyone here have Voltmace Mouse Eliminator Joystick? I need to know how moving the stick affects the mouse so we can add emulation of it to either ADFFS or USBJoystick. Only a few games supported that I'm aware of, Drop Ship and Man at Arms for example, but for the sake of completeness I'd stil...